I too have had the lights go dim even outside on a clear sunny day. I also quite often lately have what appears to be a kaliedescope(sp?) effect going on. It scares me when this happens. Sometimes this lasts for hours. I've told my doctors about it, they've check my eyes and but don't have an answer for this. Has anyone else had the kaliedescope(sp?) vision or have any idea what might be causing this????